We can use it anywhere that declarations need to be wrapped in outer-scoped
selectors, and many places where declarations are duplicated.

Media Queries

We can inline our media queries rather than maintaining separate,
device-specific stylesheets, but writing queries over and over can get pretty
unwieldy. We can simplify them by passing a content block into a mixin that
wraps a query.

Getting BEMy

Sass 3.3 adds the @at-root directive and improved &s. The former allows us
to nest declarations in Sass, but compile them to the stylesheet’s root. The
latter appends any following text directly to the parent’s selector.

In Conclusion

@content is just one of many Sass directives that can empower us to remove
duplication in our SCSS, and think more creatively about its organization and
implementation. Learn more by reading the Sass directives
documentation.

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